Table of Contents
- 1 What are the main difference between a centralized system and distributed system?
- 2 What are the advantages of a distributed DBMS over a centralized DBMS?
- 3 What are difference between distributed system characteristics and centralized system characteristics?
- 4 What is the difference between homogeneous & heterogeneous databases?
- 5 What are the advantages and disadvantages of distributed database systems?
- 6 What is the difference between a centralized IT function from a distributed IT function?
- 7 How does duplication work in a distributed database?
- 8 How are distributed databases kept up to date?
What are the main difference between a centralized system and distributed system?
Centralized Systems vs Distributed Systems
| Centralized Systems | Distributed Systems |
|---|---|
| Systems are only vertically scalable. Processing power can only be added to the central server and up to a certain limit only. | Both horizontally and vertically scalable. Servers can be added and removed with varying loads. |
What is the difference between a distributed database and distributed processing?
In distributed processing, a database’s logical processing is shared among two or more physically independent sites that are connected through a network. A distributed database, on the other hand, stores a logically related database over two or more physically independent sites.
What are the advantages of a distributed DBMS over a centralized DBMS?
Better Response − If data is distributed in an efficient manner, then user requests can be met from local data itself, thus providing faster response. On the other hand, in centralized systems, all queries have to pass through the central computer for processing, which increases the response time.
What’s the difference between distributed and centralized version control software?
The main difference between the two classes is that Centralized VCSs keep the history of changes on a central server from which everyone requests the latest version of the work and pushes the latest changes to. On the other hand, on a Distributed VCS, everyone has a local copy of the entire work’s history.
What are difference between distributed system characteristics and centralized system characteristics?
In a centralized scheme, a single hardware device, referred to as a bus controller or arbiter, is responsible for allocating time on the bus. In a distributed scheme, there is no central controller. Rather, each module contains access control logic and the modules act together to share the bus.
What is distributed processing in DBMS?
Distributed processing is the use of more than one processor to perform the processing for an individual task. Examples of distributed processing in Oracle database systems appear in Figure 29-1.
What is the difference between homogeneous & heterogeneous databases?
In a homogeneous system, all sites use the same DBMS product. In a heterogeneous system, sites may run different DBMS products, which need not be based on the same underlying data model, and so the system may be composed of relational, network, hierarchical and object-oriented DBMSs.
What are the main differences between a distributed and a non distributed system?
In a non-distributed (or co-located) system, all the parts of the system are in the same physical location. In a distributed system, parts of the system exist in separate locations.
What are the advantages and disadvantages of distributed database systems?
Distributed Database Advantages and Disadvantages
| Advantages | Disadvantages |
|---|---|
| Modular development | Costly software |
| Reliability | Large overhead |
| Lower communication costs | Data integrity |
| Better response | Improper data distribution |
What are the advantages of distributed version control systems compared to Centralised systems?
Unlike a centralized VCS, a distributed version control system enables every user to have a local copy of the running history on their machine, so if there’s an outage, every local copy becomes a backup copy and team members can continue to development offline.
What is the difference between a centralized IT function from a distributed IT function?
In a centralized network, all users are connected to a central server that stores complete network data and user information. On the contrary, a decentralized network has several peer-to-peer user groups wherein each group has its separate server that stores data and information relevant to only that particular group.
What’s the difference between a centralized and a distributed database?
A distributed database is the term used to describe a set of databases stored on multiple computers, but that present as a single database to users. A centralized database is stored at a single location; a mainframe computer, for instance. It can be accessed, maintained and modified only from that location.
How does duplication work in a distributed database?
The duplication process identifies one database as a master database and duplicates that database. This process is not complicated as the replication process but makes sure that all the distributed databases have the same data. What is the difference between Distributed Database and Centralized Database?
What are the advantages of a distributed database?
Another advantage is that if one database fails, there are other database files. Therefore, the system still runs and the users can access them. On the other hand, as there are multiple files, it requires time for data synchronization. It is also necessary to maintain the data consistency. Furthermore, there can be duplications of the same data.
How are distributed databases kept up to date?
Users access the data in a distributed database by accessing the WAN. To keep a distributed database up to date, it uses the replication and duplication processes. The replication process identifies changes in the distributed database and applies those changes to make sure that all the distributed databases look the same.